WO2016075724A1

WO2016075724A1 - Cutter for electrode cutting and electrode cutting device

Info

Publication number: WO2016075724A1
Application number: PCT/JP2014/005688
Authority: WO
Inventors: 厚志渡辺
Original assignee: 株式会社キョクトー
Priority date: 2014-11-12
Filing date: 2014-11-12
Publication date: 2016-05-19

Abstract

Provided are a cutter for electrode cutting and an electrode cutting device provided with that cutter for electrode cutting that can cut tip end surfaces of electrodes with excellent precision, wherein maintenance of the device is simple, and the cost of which can be reduced. Specifically, a cutting plate 5 has cutting blades 51c on peripheral edge parts thereof and is attachably and detachably attached to a cutter 2 in an orientation such that the direction of plate thickness matches the direction of rotation of the cutter 2. The cutting blades 51c are provided in a pair in positions with point symmetry when viewed in a direction along the surface of the cutting plate 5 and in a direction crossing the rotational axial center C1.

Description

Electrode cutting cutter and electrode cutting device

The present invention relates to an electrode cutting cutter used for cutting the tip end face of an electrode for projection welding and an electrode cutting apparatus equipped with the electrode cutting cutter.

Generally, the tip surface of an electrode used for projection welding is worn out after a predetermined number of weldings, or when welding a plated steel plate, the alloyed metal adheres and the state deteriorates. It is necessary to periodically cut using a cutting device.

For example, the electrode cutting device of Patent Document 1 includes a vertically symmetric electrode cutting cutter having a cutting edge portion on each of an upper surface and a lower surface. The cutter rotates about a rotation axis extending in the vertical direction, and simultaneously contacts the tip surfaces of a pair of vertically opposed electrodes attached to the projection welding apparatus on the upper and lower surfaces of the rotating cutter. It is supposed to cut.

JP 2000-107866 A

By the way, the pair of vertically opposed electrodes attached to the projection welding apparatus as in Patent Document 1 are difficult to coincide with each other due to variations in attaching the electrodes to the apparatus, manufacturing errors of the apparatus itself, and the like. . Therefore, it is difficult to make the central axes of both electrodes coincide with the rotation axis of the cutter at the same time, and when two electrodes are simultaneously cut with one cutter as in Patent Document 1, at least the tip surfaces of both electrodes On the other hand, cutting is performed in a state where the central axis does not coincide with the rotation axis of the cutter.

In order to avoid this, it is conceivable that a cutting edge portion is provided only on one of the upper surface and the lower surface of the cutter, and both electrodes are removed from the projection welding apparatus and cut one by one with the cutter. However, in such a case, the cutting amount of the cutting edge portion with respect to one projection welding apparatus is doubled as compared with the electrode cutting apparatus as disclosed in Patent Document 1 in the electrode cutting operation. Becomes intense and the frequency of cutter replacement increases. In this case, not only the cost of parts increases, but a large number of spare parts for the cutter need to be prepared in advance, so that the periphery of the apparatus becomes complicated.

The present invention has been made in view of such points, and an object of the present invention is to cut the tip surface of the electrode with high accuracy and to provide a low-cost electrode cutting cutter that does not make the surroundings of the apparatus complicated. It is providing the electrode cutting device provided with the cutter for electrode cutting.

In order to achieve the above object, the present invention is characterized in that a plate that can be attached to and detached from the main body portion of the cutter is provided, and two cutting edge portions are provided on the plate.

That is, in the first invention, a rotating body having an electrode receiving surface that receives the tip end surface of a projection welding electrode on one side in the rotational axis direction with the central axis of the electrode aligned with the rotational axis, and a plate When the tip end surface of the electrode is received by the electrode receiving surface in a posture in which the thickness direction coincides with the rotation direction of the rotating body and the tip end surface of the electrode is received by the electrode receiving surface, the tip end of the electrode is rotated. And a cutting plate having a cutting edge portion for cutting the surface at the peripheral edge portion, and a pair of the cutting edge portions are provided symmetrically in the direction of the rotation axis.

According to a second invention, in the first invention, when the tip end surface of the electrode is received by the electrode receiving surface, it is formed along the central axis of the electrode on one side in the rotational axis direction of the rotating body. A protrusion that fits into the through hole is provided.

According to a third invention, in the second invention, a screw comprising a shaft portion and a head continuously connected to the shaft portion is provided, and the screw is provided on one side of the rotating body in the rotational axis direction of the shaft portion. A center axis is detachably fastened so as to coincide with the rotation axis, and the protrusion is formed of a head portion of the screw.

According to a fourth aspect of the present invention, there is provided rotational movement means for moving one of the first to third electrode cutting cutters in the direction of the rotational axis while rotating the electrode, and the center axis of the electrode in the direction of the rotational axis. Two jigs that can be set along, and a slide table provided so as to be slidable in a direction intersecting with the rotation axis, and both jigs are attached at predetermined intervals in the sliding direction, When the slide table is slid to one side, the center axis of the electrode set on the one jig coincides with the rotation axis, and when the slide table is slid to the other side, the electrode is set on the other jig. The center axis of this is configured to coincide with the rotational axis.

According to a fifth invention, in the fourth invention, a safety cover for enclosing a cutting work space between the rotational movement means and the slide table is provided, and the safety cover is located at a position facing the slide direction of the slide table. A pair of notch recesses that open downward is formed, and one of the notch recesses allows the one jig to pass from the outside to the inside of the safety cover by sliding to one side of the slide table. The one jig is passed from the inside to the outside of the safety cover by the sliding operation to the other side of the slide table, and the other of the notch recesses is moved by the sliding operation to the one side of the slide table. , While allowing the other jig to pass from the inside to the outside of the safety cover, by sliding to the other side of the slide table, The serial other jig is characterized by passing to the inside from the outside of said safety cover.

The sixth invention is characterized in that, in the fifth invention, the safety cover is provided with a cover brush having a hair bundle covering the notch recess.

According to a seventh invention, in any one of the fourth to sixth inventions, a support body that slidably supports the slide table is provided, and the rotary moving means rotates the rotary body by supplying compressed air. When the electrode cutting cutter is moved to the jig side by the air motor and the rotational movement means, it comes into contact with the support and starts supplying compressed air to the air motor, while the rotational movement means When the electrode cutting cutter is separated from the jig, the electrode cutting cutter is provided with a mechanical valve that is in a non-contact state with the support and stops supplying compressed air to the air motor.

In an eighth aspect based on the seventh aspect, the compressed air is connected to an air pipe routed between the air motor and the mechanical valve, and discharges compressed air toward at least one of the rotating body and the cutting work space. An air discharge means is provided.

In the first invention, since the center axis of the electrode that cuts the tip surface can be surely aligned with the rotation axis of the cutter during the cutting operation, the tip surface of the electrode can be cut with high accuracy. it can. In addition, if the cutting plate is turned over and attached to the main body of the cutter after cutting the tip surface of the electrode multiple times, the cutting edge after use will be positioned on the opposite side of the electrode and before use. The cutting blade portion is positioned on the electrode side. Therefore, it is not necessary to prepare a large number of spare parts for the cutting plate in advance, and the surroundings of the apparatus are not complicated. Furthermore, when the cutting edge is consumed, it is not necessary to replace the entire cutter, and only the cutting plate that is a part of the cutter needs to be replaced, so that the component cost can be kept low.

In the second invention, since the position of the cutter with respect to the electrode for cutting the tip surface is determined, the tip surface of the electrode can be reliably cut with high accuracy. In addition, since the tip end surface of the electrode is cut while the protrusions block the through hole of the electrode, it is possible to prevent chips generated during cutting from entering the through hole of the electrode.

In the third invention, since the size of the protrusion can be changed by changing the type of screw, even if the type of electrode for cutting the tip surface changes and the diameter of the through hole changes, By attaching a screw having a corresponding head to the rotating body, it is possible to reliably prevent chips from entering the through hole of the electrode.

In the fourth invention, when cutting the tip surface of the electrode positioned on one jig, the electrode for cutting the tip surface next can be set in advance on the other jig. Moreover, when the cutting operation of one jig is finished, if the slide table is slid, the electrode set on the other jig can be cut with a cutter, and the cutting operation is completed on one jig. The taken-out electrode can be taken out, and then the electrode can be set to cut the front end face. Thus, it can be set as a device with high production efficiency.

In the fifth invention, since the jig for taking out and setting the electrode is always positioned outside the safety cover, the chips generated during the cutting work are taken out and set by the safety cover. It is possible to prevent scattering toward the worker, and to ensure the safety of the worker.

In the sixth aspect of the invention, when the tip surface of the electrode is cut, the notch recess of the safety cover is covered with the hair bundle of the cover brush, so that chips generated inside the safety cover are removed from the notch recess to the outside of the safety cover. Can be prevented from jumping out. Further, when the slide table is slid, the bristles bend while contacting the jig, so that the cover brush attached to the apparatus does not obstruct the passage of the notch recess of the jig.

In the seventh aspect of the invention, since the tip surface of the electrode can be cut without the need for a power source, the apparatus can be used in a work environment where the power source is not nearby, and an electric device is used to rotate the rotating body. Compared to a device that requires a circuit, the device can be simple and low-cost.

In the eighth invention, since the chips cut out during the cutting operation are blown away by the compressed air discharged from the air discharge means, it is possible to avoid the chips from getting in the way during the cutting of the tip surface of the electrode. . In addition, the compressed air is discharged from the air discharge means by the rotation start operation of the rotating body, and the compressed air is not discharged by the rotation stop operation of the rotating body, so a separate part for operating the air discharge means is attached to the apparatus. Compared to the case, the number of parts can be reduced, and a simple and low-cost apparatus can be obtained.

It is a perspective view of the electrode cutting device concerning the embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 and shows a state immediately before cutting an electrode tip surface. It is a figure which shows the state in the middle of cutting the electrode front end surface after the state of FIG. It is a perspective view of the cutter for electrode cutting concerning the embodiment of the present invention. It is a disassembled perspective view of the cutter for electrode cutting which concerns on embodiment of this invention. FIG. 3 is a view taken in the direction of arrow B in FIG. 2. It is a figure which shows the state immediately after sliding the slide table after the state of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.

1 to 3 show an electrode cutting apparatus 1 according to an embodiment of the present invention. This electrode cutting device 1 is for cutting the tip surface 10a of the projection welding electrode 10, and includes an electrode cutting cutter 2 for cutting the tip surface 10a, and a gear box 3 (rotation) for rotating the cutter 2. Moving means).

The electrode 10 has a short, substantially cylindrical shape, and has an outer shape in which the outer diameter of the front half is larger than the outer diameter of the proximal half.

In the electrode 10, a through hole 10b is formed along the central axis, and a portion of the through hole 10b corresponding to the base end side of the electrode 10 gradually increases in diameter as it approaches the opening.

The gear box 3 includes a flat casing 30 that extends in the horizontal direction.

A communication hole 30a communicating with the inside of the casing 30 is formed on the upper surface on one end side in the longitudinal direction of the casing 30, and a pair of slide shafts 30d extending downward are formed on the lower surface on one end side in the longitudinal direction of the casing 30. It is spaced apart and fixed in the horizontal direction intersecting the longitudinal direction of the casing 30.

An air motor 31 that rotates by supplying compressed air is attached to an upper surface of one end side in the longitudinal direction of the casing 30 so as to extend in the vertical direction, and an output shaft 31a of the air motor 31 is connected to the casing via the communication hole 30a. It faces the inside of 30.

An input gear 32 having a rotary shaft 32a extending in the vertical direction is disposed on one end side in the longitudinal direction inside the casing 30, and the upper side of the rotary shaft 32a is connected to the output shaft 31a, while the rotary shaft 32a The lower side is rotatably supported by the casing 30 via a bearing B1.

An intermediate gear 33 having a rotary shaft 33a extending in the vertical direction is disposed substantially at the center inside the casing 30, and the upper end side and the lower end side of the rotary shaft 33a can rotate to the casing 30 via bearings B2 and B5, respectively. It is supported.

The intermediate gear 33 includes a first gear portion 33b that meshes with the input gear 32, and a second gear portion 33c having a smaller diameter than the first gear portion 33b, and the second gear portion 33c includes the first gear portion 33c. It is superimposed on the upper side of 33b.

An upper through hole 30b having a circular shape is formed on the upper surface on the other end side in the longitudinal direction of the casing 30, while a lower through hole 30c is formed at a position corresponding to the upper through hole 30b on the lower surface of the casing 30. Is formed.

A ring-shaped output gear 34 is disposed between the upper through hole 30b and the lower through hole 30c.

The output gear 34 includes a gear body 34a having a short cylindrical shape that opens vertically, and an upper portion of the gear body 34a is rotatably supported by the casing 30 via a bearing B3. A lower portion of the portion 34a is rotatably supported by the casing 30 via a bearing B4.

Near the center of the outer peripheral surface of the gear body 34a, an annular ridge 34b having a substantially T-shaped cross section protruding outward is provided, and a plurality of teeth formed on the outer peripheral surface of the annular ridge 34b. A portion (not shown) meshes with the second gear portion 33c.

The casing 30 is provided with a detachable lid cover 35 so as to cover the upper through hole 30b.

The cutter 2 is detachably fitted inside the gear body 34a, and the cutter 2 engages with the input gear 32 and the intermediate gear 33 when the output shaft 31a of the air motor 31 rotates. The output gear 34 rotates around the rotation axis C1 extending in the vertical direction.

As shown in FIGS. 4 and 5, the cutter 2 includes a holder 4 (rotary body) that forms a skeleton of the cutter 2 and a cutting plate 5 having a substantially T shape. It has a symmetrical shape.

The holder 4 includes a vertically elongated elongated column part 41 positioned on the rotation axis C1, and a first plate part 42 and a second plate part 43 extending outward from the side surface of the column part 41, The first and second plate-

like portions

42 and 43 are alternately provided in two in the rotation direction of the holder 4 and are positioned so as to be separated from each other by 90 ° in the rotation direction of the holder 4. Yes.

A screwing hole 41a in which a female screw is engraved on the inner peripheral surface is formed as a recess at the lower end of the column portion 41 (one side in the direction of the rotation axis C1).

A positioning screw 44 is detachably fastened to the screwing hole 41a. The positioning screw 44 includes a shaft portion 44a having a male screw on the outer peripheral surface and a head continuously connected to the shaft portion 44a. Part 44b.

The head 44b constitutes the projection of the present invention, and when the positioning screw 44 is fastened to the screw hole 41a, the central axis of the shaft portion 44a coincides with the rotation axis C1. The head portion 44b protrudes downward from the lower surface of the column portion 41.

A first guide portion 42a protrudes from the lower surface of each first plate-like portion 42 on the side far from the column portion 41, and from the column portion 41 to the column portion 41 side of the first guide portion 42a. The guide surface 42b which inclines so that it may be located below gradually as it leaves | separates is formed.

Each of the second plate-like portions 43 is thinner than each of the first plate-like portions 42, and a knock pin P <b> 1 is spaced apart on one plate surface of each of the second plate-like portions 43. A pair is attached.

Also, between the knock pins P1 on one plate surface of each of the second plate-like portions 43, a mounting hole 43a in which an internal thread is engraved is formed as a recess.

Furthermore, a second guide portion 43b is projected from the lower surface of each second plate-like portion 43 on the side far from the column portion 41, and the column portion 41 is provided on the column portion 41 side of the second guide portion 43b. A guide surface 43 c is formed so as to be gradually positioned downward as it moves away from 41.

The lower surface of the first plate-like portion 42 excluding the first guide portion 42a and the lower surface of the second plate-like portion 43 excluding the second guide portion 43b constitute the electrode receiving surface 40 of the present invention. ing.

Between the second plate-like portion 43 and the first plate-like portion 42 located on the other plate surface side of the second plate-like portion 43, the upper edge of the first plate-like portion 42 and the second plate-like portion A substantially fan-shaped bridging portion 45 that bridges the upper end edge of the portion 43 is provided.

Further, an annular portion 46 whose center coincides with the rotational axis C1 is provided above the pillar portion 41, and the annular portion 46 is formed by the pillar portions of the first and second plate-

like portions

42 and 43. It is located outside the edge on the side far from 41.

The portion corresponding to the bridge portion 45 on the inner peripheral surface of the annular portion 46 protrudes inward from the other portions and is integrated with the upper surface on the outer edge side of the bridge portion 45.

The cutting plate 5 includes a rectangular plate-shaped plate body 51 extending vertically, and a pair of projecting portions 52 that project vertically are provided on one long side of the plate body 51.

On the other long side of the plate main body 51 in the two overhanging parts 52, an inclined surface 52a is formed which is inclined so as to gradually be positioned in the overhanging direction as it goes to one long side of the plate main body 51. Has been.

The plate main body 51 is formed with a pair of fitting holes 51a that can be fitted with the respective knock pins P1 with a predetermined distance therebetween, and mounting screws are provided between the fitting holes 51a. An insertion hole 51 b through which 53 can be inserted is formed.

One corner portion of the portion excluding the overhanging portion 52 on each short side of the plate body portion 51 constitutes the cutting edge portion 51c of the present invention.

That is, a pair of the cutting edge portions 51c are provided symmetrically in the direction of the rotational axis C1 and are positioned point-symmetrically in the horizontal direction along the plate surface of the cutting plate 5 (direction intersecting the rotational axis C1). It has become.

Then, when the cutting plate 5 is placed on one plate surface of the second plate-like portion 43 so that each knock pin P1 is fitted in each fitting hole 51a, the insertion hole 51b corresponds to the mounting hole 43a. The cutting plate 5 is attached to the holder 4 by inserting the attachment screw 53 into the insertion hole 51b and screwing the attachment screw 53 into the attachment hole 43a.

That is, the cutting plate 5 is detachably attached to the holder 4 in a posture in which the plate thickness direction coincides with the rotation direction of the holder 4, and the cutting plate 5 is attached to the holder 4. In this state, the rotational axis C1 is positioned on the plate surface of the cutting plate 5 opposite to the mounting surface of the holder 4.

Further, as shown in FIG. 5, the cutting plate 5 can be attached to the second plate-like portion 43 of the holder 4 even if it is turned over in the X1 direction.

A base plate 6 (support) extending along the longitudinal direction of the casing 30 is provided below the casing 30.

A pair of slide holes 6a penetrating in the vertical direction are formed on one end side in the longitudinal direction of the base plate 6 so as to be spaced apart from each other in the horizontal direction intersecting the longitudinal direction of the base plate 6. The shaft 30d is slidably inserted.

Also, a discharge hole 6b for discharging chips is formed between the slide holes 6a of the base plate 6 in the vertical direction.

On the other hand, a pair of plate projecting portions 6f projecting outward from the respective side edge portions of the base plate 6 and forming a substantially triangular shape in plan view are formed near the other end in the longitudinal direction of the base plate 6.

A positioning hole 6c is formed through substantially vertically at the center of each plate overhang 6f, and a slit 6d is formed between the positioning holes 6c of the base plate 6.

A pair of rail members 61 extending in the horizontal direction intersecting the longitudinal direction of the base plate 6 (direction intersecting the rotation axis C1) are provided at positions sandwiching the slit 6d of the base plate 6, and both the rail members 61 are provided. Concave grooves 61 a extending along the longitudinal direction of the rail member 61 are formed on opposite sides of each other.

On the upper surface in the longitudinal direction of the rail member 61 on the discharge hole 6b side, there is formed an inclined recess 61b that is inclined so as to be positioned downward as it goes to the discharge hole 6b.

Between the rail members 61, there is provided a slide table 62 extending in the horizontal direction (direction intersecting the rotation axis C1) intersecting the longitudinal direction of the base plate 6, and both edges on the long side of the slide table 62 are provided. The portions are slidably fitted into the groove 61a of each rail member 61, respectively.

That is, the base plate 6 supports the slide table 62 so as to be slidable.

A pin 62a is slidably provided on the lower surface of the slide table 62 so as to be slidably fitted into the slit 6d.

As shown in FIGS. 6 and 7, both end sides in the longitudinal direction of the slide table 62 have a mountain shape that gradually decreases in width toward the end portion, and an index plunger 63 is formed at the center of the upper surface of each mountain-shaped portion. Is attached.

Between the index plungers 63 of the slide table 62, two jigs 64 on which the electrode 10 can be set are attached at a predetermined interval in the slide direction of the slide table 62.

The jig 64 includes a cylindrical portion 64a that opens up and down, and an annular ridge portion 64b that protrudes outward from the outer peripheral surface on the lower end side of the cylindrical portion 64a.

The electrode 10 is set on the jig 64 by inserting the base end side of the electrode 10 into the opening on the upper side of the cylindrical portion 64 a, and in the state of being set on the jig 64, The central axis is along the direction of the rotation axis C1.

Then, as shown in FIG. 6, the slide table 62 is slid to one side, and when the pin portion of one index plunger 63 is inserted into one positioning hole 6c, it is set in one jig 64. The center axis of the electrode 10 is configured to coincide with the rotation axis C1.

Further, as shown in FIG. 7, the slide table 62 pulls out the pin portion of one index plunger 63 from one positioning hole 6c and slides it to the other side, and moves the pin portion of the other index plunger 63 to the other side. The center axis of the electrode 10 set on the other jig 64 coincides with the rotation axis C1 when inserted into the positioning hole 6c.

An elevating mechanism 11 for elevating the casing 30 is provided on the other end side in the longitudinal direction of the base plate 6.

The elevating mechanism 11 includes a cylindrical member 65 having a slide hole 65a, and the cylindrical member 65 is fitted in a fitting hole 6e formed at the other end in the longitudinal direction of the base plate 6.

A thin rod-like rack 66 is slidably fitted in the slide hole 65a, and the lower end of the rack 66 contacts the lower end of the tubular member 65 to restrict the upward sliding of the rack 66. A restriction plate 66a is attached.

A first spring guide 67 comprising an annular plate portion 67a having a through hole 67c and an annular extending portion 67b extending upward from the outer peripheral edge of the annular plate portion 67a is fixed to the upper end of the cylindrical member 65. The rack 66 is fitted into the through hole 67c.

Above the first spring guide 67, a second spring guide 68 comprising an annular plate portion 68a having a through hole 68c and an annular extending portion 68b extending downward from the outer peripheral edge of the annular plate portion 68a. The rack 66 is fitted into the through hole 68c.

A coil spring 69 is wound around the rack 66 between the first and second spring guides 67 and 68, and the lower end of the coil spring 69 is connected to the annular plate portion 67 a of the first spring guide 67. Is in contact with the annular plate portion 68 a of the second spring guide 68.

The upper end of the rack 66 and the upper surface on the other end side in the longitudinal direction of the casing 30 are connected by a U-shaped pressing plate 36 in plan view, and the second spring guide 68 is in contact with the lower surface of the pressing plate 36. .

A pair of support plates 60 having a fitting insertion hole 60a at the substantially center are provided on the lower surface on the other end side in the longitudinal direction of the base plate 6 so as to face each other at positions spaced apart in the horizontal direction intersecting the longitudinal direction of the base plate 6. In addition, an elongated cylindrical lever support shaft 71 is rotatably inserted into the both fitting insertion holes 60a.

A pinion 72 that meshes with the rack 66 is attached to the middle portion of the lever support shaft 71 so as to rotate together.

Further, the lever support shaft 71 is rotated by a rod-like operation lever 73.

As shown in FIG. 1, a substantially spherical gripping portion 73 a is provided at one end of the operation lever 73, and the other end is fixed to one end of the lever support shaft 71.

A U-shaped safety cover 81 having a substantially U shape in a plan view is provided on the middle portion of the base plate 6 in the longitudinal direction so as to project between the longitudinal end of the casing 30 and the base plate 6. ing.

On the other hand, an L-shaped safety cover 82 that is substantially L-shaped in a side view is fixed to the other end in the longitudinal direction of the base plate 6.

The L-shaped safety cover 82 includes a first cover portion 82a that surrounds the cutting work space S1 between the casing 30 and the slide table 62, and a second cover portion 82b that surrounds the cylindrical member 65. ing.

A U-shaped notch portion 82c is formed on the upper surface of the first cover portion 82a in order to secure a space for attaching and detaching the lid cover 35 and the cutter 2.

On the other hand, at a position corresponding to the slide table 62 on the side surface of the first cover portion 82a, a notch recess 82d that opens downward is provided facing the slide direction of the slide table 62, and each notch recess 82d includes a cover brush. 83.

The cover brush 83 includes a mounting plate 83a extending along the upper edge of each notch recess 82d and a resin hair bundle 83b extending downward from the mounting plate 83a.

Then, as shown in FIGS. 6 and 7, one of the two notch recesses 82 d moves the one jig 64 from the outside of the L-shaped safety cover 82 by sliding the slide table 62 to one side. The one jig 64 is allowed to pass from the inside to the outside of the L-shaped safety cover 82 by the sliding operation to the other side of the slide table 62 while being passed inward.

The other notch recess 82d allows the other jig 64 to pass from the inside to the outside of the L-shaped safety cover 82 by sliding the slide table 62 to one side. The other jig 64 is passed from the outside to the inside of the L-shaped safety cover 82 by the sliding operation of 62 on the other side.

A mechanical valve 9 having a switch portion 9a hanging downward is fixed to one end of the casing 30 in the longitudinal direction, and the mechanical valve 9 is connected to an air compressor (not shown).

The mechanical valve 9 has an internal valve (not shown) closed when the switch portion 9a is hung downward, and the internal valve (not shown) is opened by the switch portion 9a moving upward. It is like that.

A first air pipe 91 having a first T-shaped pipe 91a is routed between the air motor 31 and the mechanical valve 9 in the middle.

In addition, a second air pipe 92 having a second T-shaped tube 92a in the middle is routed between the first T-shaped tube 91a and the upper part of the second cover portion 82b.

Further, a third air pipe 93 is routed between the second T-tube 92a and the lid cover 35 of the casing 30, and the second and

third air pipes

92, 93 are used as the air discharge means 94 of the present invention. Is configured.

And the said gear box 3 and the said raising / lowering mechanism 11 comprise the rotational movement means 12 of this invention, and if the said operation lever 73 is rotated to one side (when it rotates to Y1 direction of FIG. 1). 2 and 3, the rack 66 slides downward against the urging force of the coil spring 69 via the lever support shaft 71 and the pinion 72, and accordingly, the pressing plate 36 is moved to the casing 30. Is pushed down from above.

Then, the gear box 3 slides and moves closer to the jig 64 by the slide shaft 30d, and the switch portion 9a of the mechanical valve 9 contacts the base plate 6 and moves upward, whereby the valve inside the mechanical valve 9 is moved. It opens and the supply of compressed air to the air motor 31 is started so that the cutter 2 rotates.

That is, the rotation moving means 12 moves the cutter 2 in the vertical direction (the extending direction of the rotation axis C1) while rotating the cutter 2.

Further, when the switch portion 9a of the mechanical valve 9 moves upward, supply of compressed air to the air discharge means 94 is started to discharge the compressed air into the casing 30 and the cutting work space S1. .

When the operation lever 73 is further rotated to one side while the cutter 2 is rotating, the electrode 10 is connected to the guide surface 42b of the first plate-like portion 42 and the guide surface 43c of the second plate-like portion 43. The front end surface 10a of the cutter 2 is received by the electrode receiving surface 40 of the cutter 2 while being guided by the electrode 10. When the front end surface 10a of the electrode 10 is received by the electrode receiving surface 40, the through hole of the electrode 10 is provided. The head 44b of the positioning screw 44 is fitted to 10b so that the center axis of the electrode 10 coincides with the rotation axis C1.

In the state where the tip surface 10 a of the electrode 10 is received by the electrode receiving surface 40, the cutting edge portion 51 c cuts the tip surface 10 a of the electrode 10 by the rotating operation of the cutter 2.

On the other hand, when the operation lever 73 is rotated to the other side (Y2 direction in FIG. 1), the rack 66 slides upward via the lever support shaft 71 and the pinion 72, and accordingly, the pressing plate 36 is moved to the gear. Box 3 is pulled up.

Then, the gear box 3 slides and moves away from the jig 64 by the slide shaft 30d, and the switch portion 9a of the mechanical valve 9 is brought into a non-contact state with the base plate 6 and hangs downward, so that the inside of the mechanical valve 9 is lowered. The valve is closed, the supply of compressed air to the air motor 31 is stopped, and the rotation of the cutter 2 is stopped.

Further, when the switch portion 9a of the mechanical valve 9 hangs down, the supply of the compressed air to the air discharge means 94 is stopped, and the discharge of the compressed air to the inside of the casing 30 and the cutting work space S1 is stopped. .

Next, an operation of cutting the tip surface 10a of the electrode 10 with the electrode cutting device 1 will be described.

First, after setting the used electrode 10 to one jig 64, as shown in FIG. 6, the slide table 62 is slid to one side to position the one jig 64 in the cutting work space S1, The pin portion of one index plunger 63 is inserted into one positioning hole 6c.

Next, the used electrode 10 is set on the other jig 64.

Next, the worker rotates the operation lever 73 shown in FIG. 1 in the Y1 direction. Then, as shown in FIGS. 2 and 3, the gear box 3 is lowered and the switch portion 9 a of the mechanical valve 9 contacts the base plate 6 and moves upward.

When the switch portion 9a of the mechanical valve 9 moves upward, the supply of compressed air to the air motor 31 is started, the cutter 2 starts to rotate around the rotation axis C1, and the second and

third air pipes

92, 93 are connected. Then, the discharge of compressed air is started into the casing 30 and the cutting work space S1.

Thereafter, the operator further rotates the operation lever 73 in the Y1 direction. Then, while the electrode 10 set on one jig 64 is guided by the guide surface 42b of the first plate-like portion 42 and the guide surface 43c of the second plate-like portion 43, the tip surface 10a thereof is the electrode of the cutter 2. It contacts (receives) the receiving surface 40. At that time, the head 44b of the positioning screw 44 is fitted into the through hole 10b of the electrode 10, and the central axis of the electrode 10 coincides with the rotation axis C1.

Then, the tip surface 10a of the electrode 10 is cut by the cutting edge portion 51c by the rotating operation of the cutter 2.

After performing the cutting operation of the electrode 10 set on one jig 64 for a predetermined time, the operator rotates the operation lever 73 in the Y2 direction. Then, when the gear box 3 is raised, the switch portion 9a of the mechanical valve 9 is brought into a non-contact state with the base plate 6 and hangs downward.

When the switch portion 9a of the mechanical valve 9 hangs down, the supply of compressed air to the air motor 31 is stopped, the rotation of the cutter 2 is stopped, and the inside of the casing 30 through the second and

third air pipes

92 and 93 is stopped. And discharge of the compressed air to cutting work space S1 stops.

Thereafter, the operator pulls out the pin portion of one index plunger 63 from one positioning hole 6c and slides the slide table 62 to the other side, and moves the pin portion of the other index plunger 63 to the other positioning hole 6c. Plug in.

Then, as shown in FIG. 7, since one jig 64 is positioned outside the L-shaped safety cover 82, the electrode 10 after cutting is taken out from the one jig 64 and then cut. The electrode is set on one jig 64.

Further, since the other jig 64 is positioned in the cutting work space S1 so that the cutting work can be performed, the operator performs the cutting work by rotating the operation lever 73 in the Y1 direction. In this manner, the operator sequentially performs the cutting operation of the electrode 10 after use while repeatedly performing the rotation operation of the operation lever 73 and the slide operation of the slide table 62.

As described above, according to the embodiment of the present invention, the tip surface 10a of the electrode 10 is cut one by one with one cutter 2 at the time of the cutting operation. It becomes possible to reliably match the rotation axis C1, and the tip surface 10a of the electrode 10 can be cut with high accuracy.

Further, after cutting the tip surface 10 a of the electrode 10 a plurality of times, when the cutting plate 5 is turned over and attached to the holder 4 of the cutter 2 in the X1 direction, the used cutting edge portion 51 c of the electrode 10 In addition to being located on the opposite side, the cutting edge 51c before use is located on the electrode 10 side. Therefore, it is not necessary to prepare a large number of spare parts for the cutting plate 5 in advance, and the surroundings of the electrode cutting device 1 are not complicated. Furthermore, when the cutting edge 51c is consumed, it is not necessary to replace the entire cutter 2, and only the cutting plate 5 that is a part of the cutter 2 needs to be replaced, so that the component cost can be kept low.

In addition, since the position of the cutter 2 with respect to the electrode 10 that cuts the tip surface 10a is determined by the head portion 44b of the positioning screw 44, the tip surface 10a of the electrode 10 can be cut accurately and accurately. Further, since the tip end surface 10a of the electrode 10 is cut with the head 44b of the positioning screw 44 closing the through hole 10b of the electrode 10, chips generated during cutting enter the through hole 10b of the electrode 10. Can be prevented.

In addition, since the size of the head 44b can be changed by changing the type of the positioning screw 44, even if the type of the electrode 10 for cutting the tip surface 10a is changed and the diameter of the through hole 10b is changed, By attaching a positioning screw 44 having a head portion 44b corresponding to the through hole 10b to the cutter 2, it is possible to reliably prevent chips from entering the through hole 10b of the electrode 10.

Further, when cutting the tip surface 10 a of the electrode 10 positioned on one jig 64, the electrode 10 to be cut next on the tip surface 10 a can be set in advance on the other jig 64. In addition, when the slide table 62 is slid when the cutting operation of one jig 64 is completed, the electrode 10 set on the other jig 64 can be cut by the cutter 2 and the one jig 64 is also cut. The electrode 10 that has been subjected to the cutting operation can be taken out, and the electrode 10 that cuts the tip surface 10a can be set next. Thus, the electrode cutting device 1 with high production efficiency can be obtained.

In addition, since the jig 64 for taking out and setting the electrode 10 is always positioned outside the L-shaped safety cover 82, chips generated during the cutting work are removed from the electrode 10 by the L-shaped safety cover 82. It is possible to prevent scattering toward the worker who performs the take-out work and the set work, and the safety of the worker can be ensured.

Further, when cutting the front end surface 10 a of the electrode 10, the notch recess 82 d of the L-shaped safety cover 82 is covered with the bristle bundle 83 b of the cover brush 83, so that it occurred inside the L-shaped safety cover 82. Chips can be prevented from jumping out of the L-shaped safety cover 82 from the notch recess 82d. Further, when the slide table 62 is slid, the bristle bundle 83b bends while contacting the jig 64, so the cover brush 83 attached to the electrode cutting device 1 does not obstruct the passage of the notch recess 82d of the jig 64.

Moreover, since the front end surface 10a of the electrode 10 can be cut without the need for a power source, the electrode cutting device 1 can be used in a work environment where the power source is not nearby, and the cutter 2 is rotated. Compared to the electrode cutting apparatus 1 that requires an electric circuit, the apparatus can be made simple and low-cost.

Further, since the chips cut out during the cutting operation are blown away by the compressed air discharged from the air discharge means 94, it is possible to avoid the chips from getting in the way during the cutting of the tip surface 10a of the electrode 10. Further, since compressed air is discharged from the air discharge means 94 by the rotation start operation of the cutter 2 and no compressed air is discharged by the rotation stop operation of the cutter 2, an electrode for separately operating the air discharge means 94 is used as an electrode. Compared with the case of attaching to the cutting device 1, the number of parts can be reduced, and a simple and low-cost device can be achieved.

In the embodiment of the present invention, the positioning screw 44 is fastened to one side of the cutter 2 in the direction of the rotation axis C1 so that the head 44b of the positioning screw 44 is inserted into the through hole 10b of the electrode 10 during the cutting operation. Although it is made to fit, if it is not only this but the projection-like thing which can be fitted to the through-hole 10b, it may not be the head 44b of the positioning screw 44. FIG.

In the embodiment of the present invention, the air motor 31 is used to rotate the cutter 2, but an electric motor may be used.

In the embodiment of the present invention, the mechanical valve 9 is used to control the compressed air, but a solenoid valve or the like may be used.

In the embodiment of the present invention, the compressed air is discharged to both the cutter 2 and the cutting work space S1, but the compressed air may be discharged to at least one of the cutter 2 and the cutting work space S1.

In the embodiment of the present invention, a pair of cutting blade portions 51 c are provided at positions that are point-symmetric when viewed in the direction intersecting the rotation axis C <b> 1 and along the plate surface of the cutting plate 5. However, the present invention is not limited thereto, and for example, the cutting plate 5 is formed in a rectangular plate shape without the overhanging portion 52, and a cutting edge portion is formed on one plate surface side of the cutting plate 5 and on the corners on both short sides. 51c may be provided.

The present invention is suitable for an electrode cutting cutter used for cutting the tip end surface of a projection welding electrode and an electrode cutting apparatus provided with the electrode cutting cutter.

DESCRIPTION OF SYMBOLS 1 Electrode cutting device 2 Cutter for electrode cutting 4 Holder (rotating body)
5 Cutting plate 6 Base plate (support)
DESCRIPTION OF SYMBOLS 9 Mechanical valve 10 Electrode 10a Tip surface 10b Through-hole 12 Rotation movement means 31 Air motor 40 Electrode receiving surface 44 Positioning screw 44a Shaft 44b Head (projection)
51c Cutting blade part 62 Slide table 64 Jig 82 L-shaped safety cover 82d Notch recess part 83 Cover brush 83b Hair bundle 91 First air piping 94 Air discharge means C1 Rotating shaft center S1 Cutting work space

Claims

A rotating body having an electrode receiving surface that receives the tip surface of the electrode for projection welding on one side of the rotation axis in a state in which the center axis of the electrode coincides with the rotation axis;
When the plate thickness direction coincides with the rotation direction of the rotating body and is detachably attached to the rotating body, and the tip surface of the electrode is received by the electrode receiving surface, the rotating body rotates to rotate the electrode. A cutting plate having a cutting edge part for cutting the tip surface at the peripheral part,
An electrode cutting cutter, wherein a pair of the cutting blade portions are provided symmetrically in the rotational axis direction.
The electrode cutting cutter according to claim 1,
On one side of the rotating body in the rotational axis direction, a protrusion is provided that fits into a through hole formed along the central axis of the electrode when the tip surface of the electrode is received by the electrode receiving surface. An electrode cutting cutter characterized by comprising:
In the electrode cutting cutter according to claim 2,
A screw comprising a shaft and a head continuously connected to the shaft,
The screw is detachably fastened to one side in the rotational axis direction of the rotating body so that the central axis of the shaft portion coincides with the rotational axis,
The electrode cutting cutter is characterized in that the protrusion comprises a head of the screw.
Rotating and moving means for moving the electrode cutting cutter according to any one of claims 1 to 3 in the direction of the rotation axis while rotating the electrode cutting cutter;
Two jigs capable of setting the electrode so that its central axis is along the direction of the rotation axis;
A slide table provided so as to be slidable in a direction intersecting with the rotation axis, and wherein both the jigs are attached at a predetermined interval in the slide direction;
When the slide table is slid to one side, the center axis of the electrode set on the one jig coincides with the rotation axis, and when the slide table is slid to the other side, the electrode is set on the other jig. An electrode cutting device characterized in that the central axis of the electrode coincides with the rotational axis.
In the electrode cutting device according to claim 4,
Comprising a safety cover that encloses a cutting work space between the rotational movement means and the slide table;
A pair of notch recesses opening downward is formed at a position of the safety cover facing the slide direction of the slide table,
One of the two notch recesses allows the one jig to pass from the outside to the inside of the safety cover by a sliding operation to one side of the slide table, while the sliding table moves to the other side of the safety table. , Pass the one jig from the inside to the outside of the safety cover,
The other of the notch recesses is slid to one side of the slide table to allow the other jig to pass from the inside to the outside of the safety cover, while by sliding to the other side of the slide table. The electrode cutting apparatus characterized by passing the other jig from the outside to the inside of the safety cover.
In the electrode cutting device according to claim 5,
The electrode cutting apparatus according to claim 1, wherein the safety cover is provided with a cover brush having a hair bundle covering the notch recess.
In the electrode cutting device according to any one of claims 4 to 6,
A support body for slidably supporting the slide table;
The rotational movement means includes an air motor that rotates the rotating body by supplying compressed air;
When the electrode cutting cutter is moved to the jig side by the rotation moving means, the electrode cutting cutter is brought into contact with the support and starts supplying compressed air to the air motor, while the electrode moving cutter is started by the rotation moving means. An electrode cutting device comprising: a mechanical valve for stopping supply of compressed air to the air motor in a non-contact state with the support when the cutter is separated from the jig.
In the electrode cutting device according to claim 7,
It is connected to an air pipe routed between the air motor and the mechanical valve, and includes air discharge means for discharging compressed air toward at least one of the rotating body and the cutting work space. Electrode cutting device.